Thank you for the prompt replies. As I suspected, re-programming the eprom did the trick. But how to re-program? The critical directions were actually on the FD website for another product. After some research I figured out how to install “hyper terminal” to be able to communicate directly with the ST2. Apparently this was a utility last included with Windows XP. Several hours later, I had things talking to one another, followed the calibration instructions under the ST2 page, flashed the eprom, and now it’s working as it should on several passes. Wowsers, that was annoying but very educational. Thanks again. 73, Craig N6RSX
From: Charles Reiche charlieray@gmail.com Sent: Sunday, August 16, 2020 1:30 PM To: D. Craig Fox DCFox@rwglaw.com; AMSAT BB Amsat-bb@amsat.org Subject: Re: [amsat-bb] Fox Delta ST2 issue
Hi Craig,
Do the readings on your yaesu control box AZ meter read correctly or are they also wacky? Looking at the circuit diagram, the AZ pot and the output to the plug that runs to the ST-2 goes through different circuitry to the plug than to the meter in the control box. If the control box meter reads correctly, then the problem is probably in the circuitry that connects to the external plug that goes to the ST-2.
Measure your 5v bus on the interface is actually running at 5v. I had problem with my voltage regulator (I soldered it in backwards) and did not have 5v where it needed to be.
Thanks, Charles Reiche
On Sun, Aug 16, 2020 at 3:37 PM D. Craig Fox via AMSAT-BB <amsat-bb@amsat.orgmailto:amsat-bb@amsat.org> wrote: Greetings all. I searched the amsat BB archive but found no answer so posting this. For no apparent reason, my FD st2 connected to my G5400 has just started misbehaving after working great for months. Using W10. It is displaying incorrect AZ, while EL is correct. It parks the G5400 at 225 deg instead of default 300. It will show EL in excess of 500+ deg when manually turning the G5400 clockwise. I have the most current driver for my usb-serial cable. Im thinking I need to reset the EPROM but an find no directions on the FD website or internet on how to do this after initial setup. I will email Dinesh at FD if no answers. Any help would be appreciated. Thank you and 73 from OC DM13
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